Hyperbole may intensify quantity, but it may also describe an event of an extraordinary kind. In the phrase about weeping blood, the primary force lies in the unusual kind of object, not merely in saying that tears are abundant.
A bare statement of the capacity to weep cannot supply the same picture. Stating «دمًا» adds it. Yet when a following line speaks of reflection or longing, its own syntax and rhetorical purpose must be respected; one should not automatically posit the same deleted object in every subsequent phrase.
The decisive factors are both recoverable context and communicative aim.